During the cold season, sunlight streaming directly into the room through skylights increases the heat storage temperature of the floor and walls, reducing the frequency of heating use and achieving passive solar heating. The roof skylight is made of aluminum alloy. Durable materials and waterproof performance are enough to resist hail, rainstorm and strong wind. Can be used for a long time. The roof sunroof has 2 support rods that can slowly close onto the lid, reducing noise and preventing the lid from pinching fingers. It can be opened 80 ° and supported. This large skylight roof hatch is designed for versatility and supports various installations, including attic entrances, basement entrances, roof maintenance, or emergency exits. The bottom frame of the lid has pre drilled holes and is equipped with bolts for easy installation. If you want it to be more waterproof, you can fill the gaps with glue. It can not only be used as attic skylights, escape routes, basement exits, emergency entrances, wellheads, cellars, and manholes, but also for home decoration, industry, commerce, schools, and more., Manufacturer: WLH Alexanders